It is in row 1 (period 1).
Hydrogen is in Group 1 and Period 1 on the periodic table.
The mass number of hydrogen is 1. It is the sum of the number of protons and neutrons in the nucleus of a hydrogen atom.
The atomic number of hydrogen is 1, which means that a hydrogen atom has one proton in its nucleus.
Hydrogen has an atomic number of 1, which means it has 1 proton in its nucleus. This is the defining characteristic of hydrogen as an element.
The element hydrogen chloride does not exist on its own; it is a compound made of hydrogen and chlorine. Hydrogen has an atomic number of 1, and chlorine has an atomic number of 17.
Hydrogen's atomic number, 1, shows that hydrogen should appear in the highest row of the periodic table in the leftmost box of that row.
Hydrogen is in Group 1 and Period 1 on the periodic table.
Francium has the largest nucleus in the hydrogen group; it's always the atom in the lowest row (highest period number) of any column in a normal periodic table that has the largest nucleus in that column.
It is often referred to as the row header or row heading or row number.
the first row (or period) contains two element: hydrogen and helium both of which are nonmetals.
The number of electron shells in an atom is determined by the principal quantum number (n). This number indicates the energy level of the shell, with larger values of n corresponding to higher energy levels. Each shell can hold a maximum number of electrons based on the formula 2n^2.
Hydrogen and Helium
hydrogen (and helium)
The row number describes the period. It signifies the number of shells.
Hydrogen Hydrogen Hydrogen Hydrogen
It is the number to the left of the row. For example, the first row heading is "1."
True. Row number on the periodic chart will be the same as the shell number.